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[Differences between the complexes formed by monomeric fibrin with fragment D and dimer D]
Ukrainskii Biokhimicheskii Zhurnal (1978)
|January 1, 1983
Summary
Monomeric fibrin (fm) forms distinct complexes with fibrinogen fragment D and stabilized fibrin dimer D. fm-D complexes are unstable, while fm-DD complexes are stable, offering insights into fibrin formation.
Area of Science:
- Biochemistry
- Molecular Biology
- Hematology
Background:
- Fibrin formation is crucial for hemostasis.
- Understanding the molecular interactions in fibrin polymerization is key.
Purpose of the Study:
- To investigate the formation and characteristics of monomeric fibrin (fm) complexes with fibrinogen fragment D (D) and dimer D (DD).
- To elucidate the stability and composition of these complexes.
Main Methods:
- Complex formation studies using varying concentrations of reactants.
- Analysis of complex composition and stability.
Main Results:
- Monomeric fibrin (fm) forms distinct complexes with fragment D (D) and dimer D (DD).
- fm-D complexes exhibit instability and variable composition, with a maximum D/fm molar ratio of 3.
- fm-DD complexes are stable with a constant DD/fm molar ratio of 1.
- In mixed systems, complexes form with a total D-unit incorporation approaching 3.
Conclusions:
- The differential complex formation highlights distinct roles of fragment D and dimer D in fibrin assembly.
- A model is proposed for protofibril formation involving monomeric fibrin interactions and lateral linking.
- Findings contribute to understanding the structural dynamics of fibrin clot formation.